| George Sargent Merrill | |
| Birth Date: | 10 March 1837 |
| Birth Place: | Methuen, Massachusetts |
| Death Place: | Lawrence, Massachusetts |
| Placeofburial Label: | Place of burial |
| Allegiance: | United States of America Union |
| Branch: | United States Army Union Army |
| Serviceyears: | 1862–1863 |
| Rank: | captain |
| Unit: | Company B, 4th Regiment Massachusetts Infantry (nine-month militia) |
| Battles: | American Civil War
|
| Laterwork: | newspaper editor, 10th Commander-in-Chief, Grand Army of the Republic |
George Sargent Merrill (March 10, 1837 - February 17, 1900) was an American soldier who served in the Union Army and as the 10th Commander-in-Chief of the Grand Army of the Republic, 1881-1882.
Merrill was born March 10, 1837, in Methuen, Massachusetts, to Johnathan and Margaret (Clark) Merrill.
On August 28, 1862, Merrill enlisted in Company B, 4th Regiment Massachusetts Infantry (nine-month militia) and commissioned 1st lieutenant, September 1, 1862. He was promoted to captain on December 8, 1862. He mustered out of the service with the regiment August 28, 1863, at Camp Hooker in Lakeville, Massachusetts.
In 1875, Merrill was elected Commander of the Massachusetts Department, Grand Army of the Republic. He was elected the 10th Commander-in-Chief of the G.A.R. in 1881 at the national encampment in Indianapolis, Indiana. Following his service as Commander-in-Chief, Merrill continued to serve the organization as chairman of the pensions committee and was very active as an advocate for Civil War veterans' pensions as a lobbyist to the United States Congress.
He was also a veteran companion of the Massachusetts Commandery of the Military Order of the Loyal Legion of the United States.
Merrill died February 17, 1900, in Lawrence, Massachusetts and is buried there in Bellevue Cemetery.